JPH11264434A - Vibration proof supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration proof supporting device capable of obtaining highly accurate vibration proof supporting characteristics while an assembling efficiency is being improved to a great extent. SOLUTION: An electromagnetic actuator 52 is so constituted that a permanent magnet 52c attracting a movable member 78 to one end surface of a yoke 52a in a solid cylindrical shape, and an exciting coil 52b generating electromagnetic force in the right/reverse directions with respect to the permanent magnet, are disposed so as to be provided, an annular recessed part 52d is formed in the side circumferential surface of the yoke, and the recessed part 52d communicates with an air chamber S2 formed around the movable member. A spacer 70 is outwardly provided for the side circumferential surface of the electromagnetic actuator. The spacer is composed of an upper cylindrical body 70a and a lower cylindrical body 70b in which the outer diameter of the side circumferential surface of the yoke is set to be equal to the inner diameter of the spacer, and of a cylindrical diaphragm 70 fixed in between these cylindrical bodies in the axial direction. And the upper cylindrical body is disposed to one upper surface of the yoke from the recessed part, and the lower cylindrical body is disposed to the down below side of the recessed part, so that the diaphragm is thereby faced to the recessed part. And the diaphragm is then swelled out in the inside of the recessed part so as to allow a diaphragm chamber to be thereby formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a vibrating body such as an engine of a vehicle on a supporting body such as a vehicle body while damping the vibration of the vehicle. The present invention relates to an anti-vibration support device.

[0002]

2. Description of the Related Art As a prior art of this kind, there is an anti-vibration support device described in, for example, Japanese Patent Application Laid-Open No. 9-273585.

[0005] That is, an anti-vibration support device as a prior art will be described with reference to FIG. 5. This anti-vibration support device 1 is a flat fixing member 2 fixed to a vibrating body such as an engine, for example.
A bolt 2a for attachment to the engine is integrally provided on the upper surface of the fixing member 2, and the center of the upper surface of the supporting elastic body 3 is vulcanized and bonded to the back surface of the fixing member 2. ing.

The supporting elastic body 3 is a thick circular rubber-like elastic body whose central portion is raised above the peripheral edge, and its outer peripheral surface is vulcanized on the inner peripheral surface of the upper end of the orifice constituting member 4. Glued. The orifice constituting member 4 is disposed inside a cylindrical device case 9 together with an annular seal ring 5, an annular gap holding ring 6, a cylindrical spacer 7 and an electromagnetic actuator 8.
A load sensor 10 for detecting a residual vibration required for vibration reduction control is provided below the electromagnetic actuator 8, and a lower cover 11 is provided so as to cover the load sensor 10 from below.
Are arranged. Each component is built in the device case 9 by caulking and fixing the lower end of the device case 9 toward the outer periphery of the lower lid 11.

The electromagnetic actuator 8 includes a cylindrical yoke 8a made of iron, an annular exciting coil 8b fixed to the upper surface of the yoke 8a with its axis extending up and down, and a pole at the center of the upper surface of the yoke 8a. And a permanent magnet 8c fixed upward and downward. Yoke 8a includes an upper yoke member 8a ₁ of annular, has a half structure of the lower yoke member 8a ₂ having a solid cylindrical part in fixing the permanent magnet 8c to the central portion, an annular these outer peripheral surfaces Recess 8a ₃
Are formed.

[0006] The spacer 7 is a member fixed integrally to the diaphragm 12 in the circumferential direction of the inner circumferential surface thereof, by the diaphragm 12 enters into the recess 8a ₃ of the yoke 8a, the diaphragm chamber on the outer periphery of the electromagnetic actuator 8 (Hereinafter, this is referred to as an actuator-side diaphragm chamber.)
15 are formed. The air holes formed in the device case 9 and the spacer 7 and communicating with the outside air communicate with the actuator-side diaphragm chamber 15.

[0007] The seal ring 5 and the gap holding ring 6 sandwich and support the outer periphery of a disc-shaped leaf spring 13. A movable lower portion made of a magnetizable metal such as iron is provided at the lower center of the leaf spring 13. The member 14 is fixed, and a predetermined gap is provided between the movable member 14 and the permanent magnet 8c. Further, a fluid chamber 15 is formed by the upper surface of the leaf spring 13, the lower surface of the support elastic body 3, and the inner peripheral surface of the orifice constituting member 4, and the fluid is sealed in the fluid chamber 15.

In the case of the anti-vibration support device 1 having such a configuration, the electromagnetic force generated by the electromagnetic actuator 8 is changed by a drive signal supplied from a controller (not shown), and the movable member 14 is displaced in the up-down direction, so Since the volume of the chamber 15 changes and the change in the volume acts on the expansion direction spring of the support elastic body 3, an active support force is generated between the fixing member 2 and the device case 9. Therefore, by appropriately generating the drive signal to be supplied to the electromagnetic actuator 8 according to an adaptive algorithm or the like, the vibration transmitted from the fixed member 2 side to the outer cylinder device case 9 side can be canceled or reduced by the supporting force. Therefore, the vibration level on the support side can be reduced.

Further, the air chamber between the upper surface and the plate spring 13 of the yoke 8a is (space indicated by the letter S ₁ designates in FIG. 5) is formed, air in the air chamber S ₁ is Ya air temperature Since the air spring acts as an air spring whose spring constant changes due to a volume change according to the atmospheric pressure, the displacement amount of the movable member 14 may change as the air temperature and the atmospheric pressure change. However, according to the above configuration, the air chamber S ₁ is, ambient air passage of the exciting coil 8b, the upper yoke member 8a ₁ and the lower yoke member 8
The air chamber S ₁ communicates with the atmosphere through an air passage between the air chamber a ₂ and the diaphragm 12 even if the air temperature or the air pressure changes.
Since the spring constant of the air inside is always constant and the displacement of the movable member 14 is constant, stable control characteristics can be obtained.

[0010]

[SUMMARY OF THE INVENTION Incidentally, the electromagnetic actuator 8, as shown in FIG. 6, place the exciting coil 8b on the lower yoke member 8a _2, then the spacer 7 so as to surround the lower yoke member 8a ₂ And then
It is assembled in steps such fitted into the upper yoke member 8a ₃ on top of the spacer 7 to be located on the lower yoke member 8a _2. This because it uses a cylindrical spacer 7 fixed to diaphragm 12 on the inner peripheral surface, before integrating the upper and lower yoke members 8a _1, 8a _2, recesses 8a ₃ of cyclic formed This is because the diaphragm 12 must be provided at the position. However, the anti-vibration support device 1 including the electromagnetic actuator 8 having this structure requires a large amount of time until assembly is completed because the number of assembly parts increases and the number of assembly steps increases accordingly.

The permanent magnet 8 of the electromagnetic actuator 8
movable member 14 facing the c, if not opposed to the electromagnetic actuator 8 coaxial (position where the electromagnetic actuator 8 and the movable member 14 is coincident with the axis P _0), the electromagnetic force of the excitation coil 8b are the same radial Does not act in the circumferential direction, and strokes up and down without maintaining the horizontal state with respect to the electromagnetic actuator 8, so that the anti-vibration control characteristics may vary. Therefore, the seal ring 5 supporting the movable member 14, the gap holding ring 6, and the leaf spring 13 are mounted on the movable member 14 so that all of the manufactured anti-vibration support devices do not vary in the vibration control characteristics. Heart P ₀
Must be inserted into the apparatus case 9 while repeatedly performing fine adjustments so as to coincide with the above. Thus, the conventional anti-vibration support device 1 has a problem in terms of assembly efficiency.

The present invention has been made in view of the unsolved problems of such a prior-art anti-vibration support device, and obtains high-precision anti-vibration support characteristics while greatly improving the assembly efficiency. It is an object of the present invention to provide an anti-vibration support device that can perform the vibration control.

[0013]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a supporting elastic body interposed between a vibrating body and a supporting body, and an apparatus case connected to the supporting elastic body. A fluid chamber defined in the support elastic body and filled with a fluid, a movable member displaced in a direction to change the volume of the fluid chamber, and a movable member disposed in the device case in response to a drive signal. An electromagnetic actuator that generates a force for displacing the movable member, wherein the electromagnetic actuator forms a diaphragm chamber that communicates with the atmosphere via a diaphragm, and the inner space of the diaphragm chamber and the movable member are displaced. The electromagnetic actuator is provided on one end face of a solid cylindrical yoke. A permanent magnet for attracting members and an exciting coil for generating an electromagnetic force in forward and reverse directions with respect to the permanent magnet are provided, and an annular concave portion is formed on a side peripheral surface of the yoke. A first cylinder and a second cylinder having the same inner diameter as the diameter of the side peripheral surface of the yoke, and a cylinder fixed between axial ends of these cylinders, wherein the first and second cylinders have a structure communicating with the passage; A spacer consisting of a diaphragm having a shape of a circle is externally fitted to the side peripheral surface of the electromagnetic actuator in a state where the diaphragm is bulged outward, whereby the first cylindrical body is located on the one end face side from the concave portion. And disposing the second cylinder on the opposite side of the first cylinder with the recess interposed therebetween so that the diaphragm faces the recess, and further swells the diaphragm in the recess. To form the diaphragm chamber It was.

According to a second aspect of the present invention, in the anti-vibration support device of the first aspect, the first cylindrical body is provided on a side peripheral surface of the electromagnetic actuator so as to protrude from one end surface of the yoke. A cylindrical support ring elastically supporting the movable member via a leaf spring while being externally fitted, and a cylindrical member fixing a seal member for preventing leakage of fluid from the fluid chamber to the electromagnetic actuator side The outer diameter of both the seal ring having the same shape as the inner diameter of the first cylindrical body was set, and the support ring and the seal ring were fitted inside the first cylindrical body.

[0015] Further, the invention according to claim 3 is based on claim 2.
The outer diameter of a cylindrical gap holding member provided in contact with the end surface of the yoke so that the movable member is opposed to one end surface of the yoke with a predetermined gap. The size was set to be the same as the inner diameter of the first cylinder, and the gap holding member was fitted inside the first cylinder.

[0016]

According to the first aspect of the present invention, the first cylindrical body and the second cylindrical body having the same inner diameter as the diameter of the side peripheral surface of the yoke are set.
A spacer consisting of a cylindrical body and a cylindrical diaphragm fixed between the axial ends of the cylindrical bodies is externally fitted to the side peripheral surface of the electromagnetic actuator in a state where the diaphragm is bulged outward. The cylindrical body is disposed on one end face side of the concave portion formed on the side peripheral surface of the yoke, and the second cylindrical body is placed on the first side with the concave portion interposed therebetween.
The diaphragm chamber can be formed by simply installing the diaphragm opposite to the concave portion by disposing it on the opposite side of the cylindrical body, and furthermore, by simply assembling the diaphragm in the concave portion, a disassembled part. Compared to conventional devices that integrate electromagnetic actuators and spacers from
The number of assembly parts can be reduced, and the number of assembly steps can be reduced accordingly. Therefore, according to the present invention, the assembly of the anti-vibration support device can be completed in a short time.

Further, according to the second aspect of the present invention, the first cylindrical body is externally fitted to the side peripheral surface of the electromagnetic actuator so as to protrude from one end surface of the yoke, and the support ring and the seal ring are connected to the first cylindrical body. Since the support ring and the seal ring can be arranged coaxially with the electromagnetic actuator simply by being fitted inside one cylinder, there is no need to adjust the position of the movable member. Therefore, fine adjustment work such as alignment is reduced, so that assembling efficiency can be improved as compared with the conventional anti-vibration support device.

Further, according to the third aspect of the present invention, the gap holding ring is disposed coaxially with the electromagnetic actuator only by being fitted inside the first cylinder, so that the gap holding ring is movable with the permanent magnet disposed on the yoke side. The gap with the member can be set with high accuracy.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a vehicle to which an active vibration control device, which is an embodiment of a vibration isolation support device according to the present invention, is applied.

First, the structure will be described. An engine (vibrating body) 17 is provided from a suspension member or the like via an anti-vibration support device (active engine mount) 20 capable of generating an active support force according to a drive signal. It is supported by a configured vehicle body (support) 18. Actually, a plurality of engine mounts that generate a passive supporting force according to the relative displacement between the engine 17 and the vehicle body 18 are interposed between the engine 17 and the vehicle body 18 in addition to the vibration isolating support device 20. ing. As a passive engine mount, for example, a normal engine mount that supports a load with a rubber-like elastic body,
A well-known fluid-filled mount insulator or the like in which a fluid is sealed in a rubber-like elastic body so as to generate a damping force can be applied.

Next, what is shown in FIG.
In the apparatus case 43, mount parts such as an outer cylinder 34, an orifice constituent member 36, an inner cylinder 37, and a support elastic body 32 are built in, and a fluid chamber is provided below these mount parts. The electromagnetic actuator 52 for displacing the elastically supported movable member 78 in a direction in which the volume of the fluid chamber 84 changes while forming a part of the partition wall 84, and a load sensor 64 for detecting the vibration state of the vehicle body member 28 are incorporated. doing.

That is, the anti-vibration support device 20 of the present embodiment
Has an engine-side connecting member 30 with the connecting bolt 30a fixed upward. A hollow cylindrical body 30b having an inverted trapezoidal cross section is fixed to a lower portion of the engine-side connecting member 30.

The lower side of the engine-side connecting member 30 and the hollow cylinder 30
The supporting elastic body 32 is fixed by vulcanization bonding so as to cover the periphery of b. The support elastic body 32 is a thick, substantially cylindrical elastic body that is gently inclined downward from the center to the outer periphery, and has a hollow section 32a having a mountain-shaped cross section on the inner surface. And the supporting elastic body 3 made thin
2 has a shaft center (hereinafter referred to as a mount shaft) P _1.
Is connected to the inner peripheral surface of the orifice component member 36 facing the vibrating body supporting direction (in this case, the vertical direction) coaxially with the hollow cylindrical body 30b by vulcanization bonding.

The orifice constituting member 36 is a member in which a small-diameter cylindrical portion 36c is continuously formed between an upper cylindrical portion 36a and a lower cylindrical portion 36b having the same outer diameter, and has an annular concave portion on the outer circumference. Although not shown, an opening is formed in the small-diameter cylindrical portion 36c, and the inside and the outside of the orifice constituting member 36 communicate with each other through this opening.

The outer cylinder 3 is provided outside the orifice constituting member 36.
4, the outer cylinder 34 has the same inner diameter as the outer diameters of the upper and lower cylindrical portions 36a and 36b of the orifice constituting member 36, and has an axial length equal to that of the orifice constituting member 36. These are cylindrical members set to the same dimensions. An opening 34a is formed in the outer cylinder 34, and an outer periphery of a diaphragm 42 made of a rubber thin film elastic body is coupled to an opening edge of the opening 34a so as to close the opening 34a. It bulges toward the inside of the outer cylinder 34.

When the outer cylinder 34 having the above structure is fitted around the orifice member 36 so as to surround the annular recess, an annular space is defined in the circumferential direction between the outer cylinder 34 and the orifice member 36, and the annular space is defined. The diaphragm 42 is disposed in the space in a swelled state.

The inner cylinder 37 fitted inside the orifice member 36 is a small-diameter cylindrical portion 3 of the orifice member 36.
A minimum diameter cylindrical portion 37a having a diameter smaller than 6c is provided, and annular portions 37b and 37c are formed radially outward at upper and lower ends of the minimum diameter cylindrical portion 37a. Upper annular part 3
7b is a small-diameter cylindrical portion 3 having an outer diameter of the orifice constituting member 36.
6c is formed to have a slightly smaller diameter than the lower annular portion 36c.
Has a smaller diameter than the lower end cylindrical portion 36b of the orifice constituting member 36, and has a second opening 37d formed in the minimum diameter cylindrical portion 37a.

The device case 43 has an upper end caulking portion 43a having a circular opening having a diameter smaller than the outer diameter of the upper end cylindrical portion 36a at the upper end thereof, and the shape of the case body connected to the upper end caulking portion 43a. Is a cylindrical member having the same inner diameter as the outer diameter of the outer cylinder 34 and continuous to the lower end opening (the lower end opening is indicated by a broken line in FIG. 2). After the completion of the above, the lower end opening is swaged radially inward to form a swaged portion indicated by a solid line in FIG.

Further, an outer cylinder 34 in which the support elastic body 32, the orifice constituting member 36, the inner cylinder 37, and the diaphragm 42 are integrated is fitted into the inside of the apparatus case 43 from the lower end opening thereof, and the lower surface of the upper end caulking part 43a. When the upper ends of the outer cylinder 34 and the orifice constituting member 36 are brought into contact with each other, they are arranged at the upper part in the device case 43. At this time, an air chamber 42c is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the diaphragm 42, and an air hole 43a is formed at a position facing the air chamber 42c. The air chamber 42c communicates with the atmosphere via 43a.

A cylindrical spacer 70 is fitted in a lower portion of the device case 43, and a movable member 78 is disposed in an upper portion of the spacer 70, and an electromagnetic actuator 52 is disposed in a lower portion of the spacer 70. Have been.

The spacer 70 is, as shown in FIG.
A cylindrical upper cylindrical body (first cylindrical body) 70a, a cylindrical lower cylindrical body (second cylindrical body) 70b, and a rubber thin film elastic body which is vulcanized and bonded between upper and lower ends of these cylindrical bodies. And a substantially cylindrical diaphragm 70c.

The electromagnetic actuator 52 has an external cylindrical yoke 52a, an annular exciting coil 52b disposed on the upper end side of the yoke 52a, and a magnetic pole fixed vertically to the center of the upper surface of the yoke 52a. Permanent magnet 52c
It is composed of

As shown in FIG. 3, the yoke 52a comprises an annular first yoke member 53a and a second yoke member 53b having a permanent magnet 52c fixed to a central cylindrical portion. These first and second yoke members 53
Annular concave portions 52d are formed continuously in the circumferential direction on the side peripheral surfaces of a and 53b, and an exciting coil 52b covered with a bobbin 53c is disposed in an annular space therebetween.

The lower cylinder 7 of the spacer 70
0b is externally fitted to the annular step portion 53b ₁ formed in the outer periphery of the second yoke member 53b which is continuous with the recess 52 d, to the axis of the second yoke member 53b and coaxially (lower cylinder 70b second
And the axis of the yoke member 53b are) arranged so as to coincide with the axis P _1. The upper cylinder 7 of the spacer 70
0a is fitted around the outer periphery of the first yoke member 53a and is coaxial with the first yoke member 53a (the axis of the upper cylinder 70a and the first
And the axis of the yoke member 53a are) arranged so as to coincide with the axis P _1. Here, only the lower end of the upper cylindrical body 70a is fitted around the outer periphery of the first yoke member 53a.
The upper end is disposed so as to protrude upward from the yoke 52a.

The upper and lower cylinders 70a, 70b
The diaphragm 70c between them bulges toward the concave portion 52d, and the inner peripheral surface of the device case 43 and the diaphragm 70c
The actuator-side diaphragm chamber 70d is defined in a portion surrounded by c. An air hole 43b is formed in the device case 43 at a position facing the actuator-side diaphragm chamber 70d, and the actuator-side diaphragm chamber 70d communicates with the atmosphere via the air hole 43b.

Returning to FIG. 2, a weight sensor is provided between the lower surface of the yoke 52a and the lid member 62 provided with the vehicle body side connection bolt 60 in order to detect residual vibration required for vibration reduction control. 64 are interposed. As the load sensor 64, a piezoelectric element, a magnetostrictive element, a strain gauge, or the like can be applied. As shown in FIG. 1, the detection result of this sensor is supplied to the controller 25 as a residual vibration signal e. I have.

On the other hand, above the electromagnetic actuator 52, a seal ring 72 for fixing a seal member, a support ring 74 for supporting an outer peripheral portion of a leaf spring 82, which will be described later, from a lower end to a free end, and a permanent Magnet 52c
And a gap holding ring 76 for setting a gap H between the movable members 78. The outer diameters of the seal ring 72, the support ring 74, and the gap holding ring 76 are set to the same dimensions as the inner diameter of the upper cylinder 70a of the spacer 70 described above, and the upper cylinder projecting upward from the yoke 52a. A seal ring 72 in the body 70a;
All of the support ring 74 and the gap retaining ring 76 are fitted inside. A movable member 78 is arranged inside the seal ring 72, the support ring 74, and the gap holding ring 76 so as to be vertically displaceable.

The movable member 78 is a member composed of a disk-shaped partition wall forming member 78A in appearance and a magnetic path forming member 78B formed in a disk shape larger in diameter than the partition wall forming member 78A. A bolt hole 80a is formed in the axial center of the partition wall forming member 78A located farther from the electromagnetic actuator 52, and a magnetic path forming member 78B close to the electromagnetic actuator 52 is formed.
The partition wall forming member 78A and the magnetic path forming member 78B are integrally connected by screwing a movable member bolt 80 that passes through the bolt hole 80a into the bolt hole 80a.

The partition wall forming member 78A and the magnetic path forming member 78
A ring-shaped continuous constriction 79 is defined between B, and a plate spring 82 for elastically supporting the movable member 78 is accommodated in the constriction 79. That is, the leaf spring 82 is a disk-shaped member having a hole formed in the center, and the free end of the inner periphery of the leaf spring 82 is supported from below the rear center of the partition wall forming member 78A. 82 is supported at its free end from below by a spring support portion 74a of a support ring 74, whereby the movable member 78 is
3 is elastically supported via a leaf spring 82.

The partition wall forming member 78A is formed by reducing the thickness of the partition wall portion 80c facing the fluid chamber 84,
A member formed with an annular rib 80b protruding upward from the outer periphery of the member. The upper surface of the partition wall forming member 78, the lower surface of the support elastic body 32, and the inner peripheral surface of the inner cylinder 37 form a fluid chamber 84.
Is formed, and a fluid is sealed in the fluid chamber 84.

Further, in order to prevent leakage of fluid from the fluid chamber 84 to the constricted portion 79 containing the leaf spring 82,
A ring-shaped seal member 86 made of a rubber-like elastic body is fixed between the outer periphery of the partition wall forming member 78A and the inner periphery of the seal ring 72. The elastic deformation of the seal member 86 causes the seal ring 72, The relative displacement of the movable member 78 in the vertical direction with respect to the device case 43 is allowed.

On the other hand, the exciting coil 52b of the electromagnetic actuator 52 generates a predetermined electromagnetic force in accordance with a drive signal y which is a current supplied from the controller 25. The controller 25 includes a microcomputer, necessary interface circuits, an A / D converter, and a D / A
It is configured to include a converter, an amplifier, a storage medium such as a ROM and a RAM, and the like, so that an active supporting force capable of reducing vibration generated in the engine 17 is generated in the anti-vibration support device 20.
A drive signal y for the anti-vibration support device 20 is generated and output.

Here, for example, in the case of a reciprocating four-cylinder engine, the engine vibration of a secondary component of engine rotation is generated by
The main reason is that the vibration is transmitted to the engine 8 and, if the drive signal y is generated and output in synchronization with the secondary component of the engine rotation, the vibration on the vehicle body side can be reduced. Therefore, in the present embodiment, an impulse signal synchronized with the rotation of the crankshaft of the engine 17 (for example, in the case of a reciprocating four-cylinder engine, one for every 180 ° rotation of the crankshaft) is generated, and the reference signal x Pulse signal generator 19 which outputs as
, And the reference signal x is supplied to the controller 25.

Then, based on the supplied residual vibration signal e and reference signal x, the controller 25 performs a synchronous filtered operation, which is one of the successively updating adaptive algorithms.
By executing the -XLMS algorithm, a drive signal y for the anti-vibration support device 20 is calculated, and the drive signal y is output to the anti-vibration support device 20.

More specifically, the controller 25 has an adaptive digital filter W having a variable filter coefficient W _i (i = 0, 1, 2,..., I-1: I is the number of taps). At a predetermined sampling clock interval from the time when the reference signal x is input, the adaptive digital filter W
Of one of outputting a filter coefficient W _i in the order as the drive signal y, it is adapted to execute a process of appropriately updating the filter coefficient W _i of the adaptive digital filter W based on the reference signal x and the residual vibration signal e.

The updating equation of the adaptive digital filter W is F
The following equation (1) is obtained according to the filtered-X LMS algorithm. _{W i (n + 1) =} W i (n) -μR T e (n) ...... (1) where, indicates that the value in (n), (n + 1 ) term is attached is sampling time n, n + 1, μ is a convergence coefficient. The update reference signal R ^T is theoretically expressed as
The reference signal x is transmitted to the electromagnetic actuator 5 of the anti-vibration support device 1.
2 is a value obtained by filtering a transfer function C between the load sensor 64 and the load sensor 64 with a transfer function filter C ＾ modeled by a finite impulse response filter, but since the magnitude of the reference signal x is “1”, the transfer function When the impulse response of the filter C # is generated one after another in synchronization with the reference signal x, the impulse response coincides with the sum of the impulse response waveforms at the sampling time n. Also, theoretically, the reference signal x is filtered by the adaptive digital filter W to generate the drive signal y. However, since the size of the reference signal x is “1”, the filter coefficient W _i is sequentially changed. Output as the drive signal y, the result is the same as when the result of the filter processing is set as the drive signal y.

Next, the operation of this embodiment will be described. That is, in a situation where idle vibration or muffled sound vibration is generated in the engine 17, the reference signal x is transmitted from the controller 25 to the electromagnetic actuator 52 of the vibration isolation support device 20.
Is input, the filter coefficient W _i of the adaptive digital filter W is sequentially supplied as the drive signal y at intervals of the sampling clock.

As a result, the drive signal y is supplied to the exciting coil 52b.
Is generated, but the magnetic path forming member 78B includes:
Since a constant magnetic force has already been applied by the permanent magnet 52c, the magnetic force of the exciting coil 52b is
It can be considered that it acts to increase or decrease the magnetic force of c. As described above, when the magnetic force of the permanent magnet 52c is increased or decreased, the movable member 78 is displaced in both the forward and reverse directions, and when the movable member 78 is displaced, the partition forming member 78A that forms a part of the partition of the fluid chamber 84 is formed. Is also displaced, thereby changing the volume of the fluid chamber 84, and the expansion spring of the support elastic body 32 is deformed by the change in the volume, so that an active supporting force in both the forward and reverse directions is generated in the vibration isolating support device 20. It is.

Each filter coefficient W _i of the adaptive digital filter W serving as the drive signal y is determined by a synchronous Filtered-
Since the sequentially updated by according to X LMS algorithm above (1), after the convergence to the optimal values each filter coefficient W _i of the adaptive digital filter W has passed a certain time, the drive signal y is antivibration By being supplied to the support device 1, idle vibration and muffled sound vibration transmitted from the engine 17 to the vehicle body 18 via the vibration isolating support device 20 are reduced.

The magnetic path forming member 78B of the movable member 78
Around the is formed an air chamber (space indicated by the letter S ₂ designates shown in FIG. 2) is acting as an air spring in which the spring constant is changed by the volume change of the air of the air chamber S ₂ is corresponding to the temperature and pressure Therefore, there is a possibility that the displacement amount of the movable member 78 changes with the change of the air temperature or the atmospheric pressure. However, in the present embodiment, the air chamber S around the magnetic path forming member 78B.
Reference numeral ₂ denotes an atmosphere through a gap around the bobbin 53c covering the exciting coil 52b, a gap between the joining portions of the first yoke member 53a and the second yoke member 53b, and the diaphragm 70c of the actuator-side diaphragm chamber 70d. communicates (air passage indicated by the thick arrow in FIG. 2), the amount of displacement of the movable member 78 air spring constant of the air chamber S ₂ also air temperature or pressure is changed is always constant does not change the Therefore, stable control characteristics can be obtained.

Next, a part of the procedure for assembling the components of the vibration isolating support device 20 will be described with reference to FIGS.
First, as shown in FIG. 3, the diaphragm 70c of the spacer 70 is deformed so as to bulge toward the outer peripheral sides of the upper and lower cylindrical bodies 70a and 70b. Then, the spacer 70 is connected to the electromagnetic actuator 52 (the exciting coil 52b) in which the first and second yoke members 53a and 53b are integrated.
And the permanent magnet 52c is also integrated) from above. That is, the lower cylinder 70b, it is externally fitted to the stepped portion 53b ₁ of the second yoke member 53b, an upper cylinder 70a
And by externally fitted to the outer periphery of the first yoke member 53a, (as the axis each other coincides with the axis P ₁₎ spacer 70 is coaxially to the electromagnetic actuator 52 is arranged. The diaphragm 70 bulging outward at a position corresponding to the annular concave portion 52d of the yoke 52a.
c is deformed so as to enter the annular concave portion 52d.

Next, a part of the upper cylindrical body 70b externally fitted to the electromagnetic actuator 52 protrudes from above the electromagnetic actuator 52, and as shown in FIG. The holding ring 76, the support ring 74 supporting the movable member 78 via the leaf spring 82, and the seal ring 72 to which the seal member 86 is fixed are fitted inside. At this time, the outer diameters of the seal ring 72, the support ring 74, and the gap holding ring 76 are
It is set to the same dimension as the inner diameter of the upper cylinder 70a,
Because fitted into a state where the inner circumferential surface plane contact with the upper cylinder 70a, the shaft and coaxially of the electromagnetic actuator 52 (the axis of all the members to match the axis p ₁₎ is disposed.

The electromagnetic actuator 52 and the spacer 70 located above the electromagnetic actuator 52
The members such as the seal ring 72, the support ring 74, and the gap retaining ring 76 fitted inside the upper cylindrical body 70b are assembled from the lower end opening of the device case 43, and after the assembly is completed, the lower end opening is moved in the radial direction. By caulking inward, a caulked portion shown by a solid line in FIG. 2 is formed.

Therefore, according to this assembly, the spacer 70 composed of the upper cylinder 70a, the lower cylinder 70b, and the diaphragm 70c fixed between the upper and lower cylinders 70a, 70b is expanded outwardly by the diaphragm 70c. The first and second yoke members 53a and 53b are externally fitted from above to the electromagnetic actuator 52, and the annular recess 52 of the yoke 52a is formed.
Since the diaphragm 70c facing d can be easily disposed simply by being deformed toward the recess 52d side,
From the disassembled parts, the electromagnetic actuator 8 and the spacer 7
5 and 6, the number of assembly parts can be reduced, and the number of assembly steps can be reduced accordingly. Thereby, the assembling of the vibration isolation support device can be completed in a short time.

The gap holding ring 76 is provided on the upper cylindrical body 70 projecting upward from the electromagnetic actuator 52.
because it is arranged in the electromagnetic actuator 52 coaxial only by internally fitted without positioning of the axis P ₁ to b, setting the gap H between the permanent magnets 52c and the movable member 78 of the electromagnetic actuator 52 with high precision can do. The seal ring and the support ring 74 also, since it is disposed in the electromagnetic actuator 52 and coaxially without alignment of the axis P ₁ simply fitted into the upper cylinder 70b, the alignment adjustment of the movable member 78 Becomes unnecessary. Therefore, fine adjustment work such as alignment is reduced, so that assembling efficiency can be improved as compared with the conventional anti-vibration support device.

The object of application of the present invention is not limited to a vehicle. The present invention is applicable to a vibration isolating support device for reducing vibration generated by components other than the engine 17. Regardless of the above, the same operation and effect as those of the above embodiments can be obtained. For example, the present invention is applicable to an anti-vibration support device that reduces vibration transmitted from a machine tool to a floor or a room.

Further, in each of the above embodiments, a synchronous filter is used as an algorithm for generating the drive signal y.
Although the dX LMS algorithm is applied, the applicable algorithm is not limited to this, and may be, for example, a normal Filtered-X LMS algorithm or the like.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a vehicle.

FIG. 2 is a cross-sectional view illustrating a configuration of a vibration isolation support device of the present invention.

FIG. 3 is a view showing a method of assembling a spacer for providing an electromagnetic actuator and a diaphragm chamber according to the present invention.

FIG. 4 is a view showing a method of incorporating a seal ring, a support ring, and a gap holding ring according to the present invention.

FIG. 5 is a cross-sectional view showing a configuration of a preceding vibration isolation support device.

FIG. 6 is a diagram illustrating a method of incorporating a spacer for providing an electromagnetic actuator and a diaphragm chamber of the preceding vibration isolation support device.

[Explanation of symbols]

Reference Signs List 17 engine (vibration body) 18 body (support) 20 anti-vibration support device 32 support elastic body 43 device case 52 electromagnetic actuator 52a yoke 52b excitation coil 52c permanent magnet 52d annular recess 70 spacer 70a upper cylinder (first cylinder) ) 70b lower cylinder (second tubular member) 70c diaphragm 70d actuator side diaphragm chamber (diaphragm chamber) 72 sealing ring 74 support ring 76 gap retaining ring 78 movable member 82 leaf spring 84 fluid chamber 86 sealing member S ₂ air chamber (internal Space) H gap

Claims (3)

[Claims] 1. A supporting elastic body interposed between a vibrating body and a supporting body, an apparatus case connected to the supporting elastic body, and a fluid chamber defined in the supporting elastic body and having a fluid sealed therein. A movable member that is displaced in a direction that changes the volume of the fluid chamber, and an electromagnetic actuator that is disposed in the device case and generates a force that displaces the movable member in accordance with a drive signal. An anti-vibration support device that forms a diaphragm chamber that communicates with the atmosphere via the diaphragm, and that has an air communication passage that communicates an inner space of the diaphragm chamber with an inner space at a position where the movable member is displaced. In the electromagnetic actuator, a permanent magnet that attracts the movable member to one end face of a yoke having a solid cylindrical shape,
An exciting coil that generates an electromagnetic force in the forward and reverse directions with respect to this permanent magnet is provided, an annular concave portion is formed on the side peripheral surface of the yoke, and the concave portion communicates with the ventilation communication passage. A spacer comprising a first cylindrical body and a second cylindrical body having the same inner diameter as the diameter of the side peripheral surface of the yoke, and a cylindrical diaphragm fixed between axial ends of these cylindrical bodies. Is externally fitted to the side peripheral surface of the electromagnetic actuator in a state where the diaphragm is bulged outward, whereby the first cylindrical body is disposed on the one end surface side from the concave portion, and A cylindrical body was disposed on the opposite side of the first cylindrical body with the concave portion interposed therebetween, the diaphragm was opposed to the concave portion, and the diaphragm chamber was formed by expanding the diaphragm in the concave portion. Anti-vibration support characterized by that Location. 2. The first cylindrical body is externally fitted to a side peripheral surface of the electromagnetic actuator so as to protrude from one end surface of the yoke, and elastically supports the movable member via a leaf spring. The outer diameters of both the cylindrical support ring and the cylindrical seal ring fixing the seal member for preventing leakage of the fluid from the fluid chamber to the electromagnetic actuator side are set to the inner diameter of the first cylindrical body. Set the same as the dimensions,
The vibration isolating support device according to claim 1, wherein the support ring and the seal ring are fitted inside the first cylindrical body. 3. An outer diameter of a cylindrical gap holding member disposed in contact with the movable member such that the movable member is opposed to one end surface of the yoke with a predetermined gap provided therebetween is provided. Set the same as the inner diameter of the first cylinder,
3. An anti-vibration support device according to claim 2, wherein said gap holding member is fitted inside said first cylindrical body.